The emerging Web of Data and the sheer mass of information now available make it possible the 
deployment of new services and applications based on the reuse of existing vocabularies and datasets. 
The popular diagram~\cite{linked-data-cloud}, generated from metadata extracted from the Comprehensive Knowledge Archive Network (CKAN), contains more than 
$203$ datasets, with $25$ billion RDF triples and $395$ million links (September 2011). In that sense, 
DBpedia knowledge base created by extracting structured information from the on-line encyclopedia Wikipedia is considered the center of the graph. As part of the LOD effort other similar 
initiatives have also been deployed such as LinkedGeoData, GeoNames geographical database, 
OpenLink Data Spaces among others. 

Currently, there is a W3C Interest Group defining a vocabulary and a set of instructions that ease the
discovery and usage of Linked Datasets (voID~\cite{void}), the new specification of SPARQL
(1.1) enables a method for discovering and a vocabulary for describing SPARQL services made available via an endpoint or 
a RDF store such as OpenLink Virtuoso, OpenRDF Sesame or OWLim. ELDA or Pubby are examples of Linked Data front-ends 
that provide a configurable way to access RDF data using simple RESTful URLs offering a set of best practices 
for publishing, sharing and linking data and information on the web. Regarding Linked Data lifecycles, 
there are several efforts trying to define methodologies, best practices and recipes to promote raw data 
following the guidelines and principles of the Linked Data and Open Data initiatives: 
1) ``Linked Data Design Considerations''~\cite{Heath_Bizer_2011}; 2) ``Linked Data Patterns''~\cite{linked-data-patterns};
3) ``Best Practices''~\cite{best-gld,Berr08}, ``Linked Data Cookbook''~\cite{linked-data-cookbook},
``Government Linked Data-Life Cycle''~\cite{gld-lifecycle} and ``Publishing Open Government Data''~\cite{publishing-ogd} 
 from the W3C Working Group ``Government Linked Data Working Group''~\cite{gld-group}; 4) 
``LOD2 Stack''~\cite{lod2-stack} from the European Project ``LOD2''~\cite{lod2-project}; 5) 
``Toward a Basic Profile for Linked Data''~\cite{basic-profile-w3c} from IBM, etc.

